空气冷却变压器的温升是指变压器所测量部位的温度与冷却空气温度之差。（）
参考答案：对
陶行知先生的“捧着一颗心来，不带半根草去”的教育信条体现了教师的（ ）素养。
A．教育理论知识
B．崇高的职业道德
C．文化学科知识
D．过硬的教学基本功
When crossing a front,isobars tend to（）.
A.change from smooth curves within the air mass to sharp bends at the front
B.change from sharp bends within the air mass to smooth curves at the front
C.pass smoothly across the front with no change
D.become closer together at the front and pass through in straight lines
